Work

Probing the diquark structure of Λ c in a combined analysis of Λ c → Λ K + and Λ c → Σ 0 K +

Year: 2025

Type: article

Abstract: The spatial distributions of [ u d ] diquark and heavy-light diquark of the SU(3)-flavor antitriplet charmed baryons are investigated by the two singly Cabibbo-suppressed hadronic weak decays, Λ c → Λ K + and Λ c → Σ 0 K + within the nonrelativistic constituent quark model. The above two spatial distributions are reflected by the two parameters α ρ and α λ , which are the harmonic oscillator strength parameters of the charmed baryons. These two parameters obtain strong constraints from the decay widths of Λ c → Λ K + and Λ c → Σ 0 K + . The larger the harmonic oscillator parameter is, the more compact the spatial distribution will become. The current α ρ and α λ indicate that neither the light diquark nor the heavy-light diquark turns out to favor a compact structure. In addition, some selection rules, including the “ Λ selection rule,” can be useful for the search of excited baryons in the heavy-flavor baryon hadronic weak decays.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/b6nb-b3ch

Authors: Peng-Yu Niu, Qian Wang, Qiang Zhao